Z stands for the integers (Zahlen), while N stands for the natural numbers (Natürlichezahlen).

As a great mathematician said, "God made the integers; all else is the work of man."
Well, I think Kronecker isn't going far enough. I dare say that God made the natural numbers, and even the integers are just a convenient fiction, not real.

2020-07-07 15:56:45 UTC